Piston-ring spreader.



R. R. PATCHELL.

PISTON RING SPREADER.

APPLICATION FILED APILIB, 1914.

1, 1 1 7,083, Patented Nov. 10, 1914.

2. F153. 1. 1133.3. 21km B6\ r23 M66 fiobertlilaichcll,

THE NORRIS PETERS 60.. PHOTO-LITHIUM WASHINGTON, D. C.

ROBERT R.,PATCHELL, OF CAMBRIDGE, MASSACHUSETTS.

PISTON-RING SPREADER.

Specification of Letters Patent.

Patented Nov. 10,1914.

Application filed April 13, 1914. Serial No. 831,666.

To all whom it may concern:

Be it known that I, ROBERT R. PATCHELL, a citizen of the United Statesof America, and a resident of Cambridge, in the county of Middlesex andState of Massachusetts, have invented certain new and usefulImprovements in Piston-Ring Spreaders, of which the following is aspecification.

This invention relates to combination tools and particularly to devicesadapted to be used in removing packing rings from pistons and replacingsaid rings on said pistons.

The object of the invention is to provide a simple tool for the purposewhich may be used in connection with any form of split packing ring andwhich may be used equallyas well for many other purposes, as, forinstance, twisting wire around a hose or other pipe.

The invention consists of two members pivoted together with theirmovable ends normally crossing each other and provided with working jawseach having a concaved recess and a depression therein.

The invention further consists in certain novelfeatures of constructionand arrangement of parts which will be fully understood by reference tothe description of the drawings and to the claims hereinafter iven.

g Of the drawings: Figure 1 represents a plan of a tool embodying thefeatures of the present invention. Fig. 2 represents an edge view of thesame. Fig. 3 represents a similar view with the members sprung so thatthe outer faces thereof as shown in Fig. 2 are adjacent to each other.Fig. 4 represents an enlarged plan of a portion of the tool applied to apacking ring. Figs. 5, 6, 7 and 8 represent different forms of splitrings with which the improved tool is adapted to operate. Fig. 9represents a view showing the tool used in twisting wires around a hoseor other pipe. Fig.10 represents a section through the pivoted membersand-showing the means for registering the opening of the jaws, and Fig.11 represents an end view of said jaws showing the other set ofregistering members.

Similar characters designate like parts throughout the several figuresof the drawings.

In the drawings, 12 and 13 are two members connected together at one endby the pivot member 14:. The opposite or movable the reverse of division21 indicated 8 of the drawings. The

cross each other as indicated in Fig. 1. In normal position, two facesof said members 12 and 13 are adjacent as indicated in Fig. 2, while inabnormal position the members 12 and 13 may be sprung so that theopposite faces thereof will be adjacent to each other as indicated inFig. 3 of the drawings. The extreme end of each member is provided witha concaved recess 15 forming a projectends of the members 12 and 13overlap and ing finger 16, this finger being adapted to enter betweenthe split ends of a packing ring 17 to separate the ends in removing itfrom a piston or for the purpose of spreading it so that the ring may beplaced inpositron 1n a, groove upon the periphery of said p ston.Packing rings 17 are split or divided 1n various manners as indicated inF lgs. 5 to 8 inclusive of the drawings, the division line indicated at18 in Fig.5 of the drawings being the reverse of the division line 19indicated in Fig. 6 of the drawings, and the division 20 indicated inFig. 7 being in Fig. acking ring in the form shown in Fig. 5 of thedrawings has square ends with which the projecting fingers 16 areadapted to engage. It is obvious that these projecting fingers would notengage the inclined faces of the packing rlngs indicated in Figs. 7 and8 of the drawings and to provide means for spreading this type ofpacking ring the concaved recesses 15 have each extending inwardlytherefrom a recess 22 adapted to receive the pointed ends of the packingring 17. When the members 12 and 13 are. in the position indicated inFig. 2, the working jaws are adapted to coact with the opposite ends ofthe forms of packing ring 17 shown in Figs. 5 and 7 of the drawings, andwhen it is desired to have them coact with the forms of packing ringshown in Figs. 6 and 8; the members 12 and 13 have to be sprung into theposition shown in Fig. 3 of the drawings. In either case the movableends of the members 12 and 13 are normally crossed and when the edgesare positioned against the opposed ends of the packing ring thesqueezing pressure of the hand on the members 12 and 13 will cause thesemembers to be moved toward each other and the working jaws at themovable ends thereof separated, thereby expanding the rings either forthe purpose of inserting them into the grooves of the piston or ofremoving them therefrom.

The adjacent faces of the members 12 and 13 as viewed in Fig. 2 haveextending therefrom stop members 23 which are formed integral with saidmembers and are adapted to engage with one another to limit the outwardmovement of the members 12 and 13 about the pivot 1 1. On the oppositefaces of the members 12 and 13 are similar stop members 2% differentlypositioned relative to the ends of said members and serving the samepurpose as the projections 23 when the members 12 and 13 are in theposition shown in Fig. 3 of the drawings. These members 28 and 2 1 arepreferably positioned relative to the ends of said members 12 and 13 sothat the projecting fingers 16 will be separated just the right distanceto enter the slits in and engage with the ends of the packing rings 17,these rings for gasolene engines being usually in two sizes and with theslits in one size differently spaced from the other size. When the toolis used to remove a packing ring the whole ring is expanded, the strainbeing evenly distributed over the entire surface, which is quitedifferent from the results obtained when screw drivers or other similarmeans are used to pry the ring from its groove.

The tool may be used for several other purposes, as for instance, whenit is desired to repair a hose or other pipe 25 by binding it with wire26, loops being formed in the ends of the wire 26, and then the jaws ofthe members 12 and 13 are inserted in the loops, and the wire is twistedas indicated in Fig. 9 of the drawings. The tool is adapted for use alsoeither as inside or outside calipers. It is believed that the manyadvantages of a tool of this kind will be fully understood from theforegoing description.

Having thus described my invention, I claim:

1. A tool consisting of two members pivoted together at one end andadapted to cross each other near the opposite ends which ends areprovided with concaved recesses extending transversely of said membersand facing outwardly in opposite directions.

2. A tool consisting of two members pivoted together at one end andadapted to cross each other near the opposite ends which ends areprovided with concaved recesses extending transversely of said members,and terminating in extensions with sharp edges facing outwardly inopposite directions.

8. A tool consisting of two members pivoted together at one end andadapted to cross each other near the opposite ends which ends areprovided with concaved recesses extending transversely of saidv membersand facing outwardly in opposite directions on opposite sides of thepoint of crossing of said members, and stop members proj ecting fromadjacent faces of said members.

at. A tool consisting of two members pivoted together at one end andhaving the opposite ends crossing and provided with transverse recesseshaving walled depressions extending therefrom, said recesses beinglocated on opposite sides of the point of crossing and facing outwardlytherefrom.

A tool consisting of two members pivoted together, said members havingrecessed jaws normally facing outwardly from each other and adapted tobe further separated when said members are moved inwardly about thepivotal connection.

6. A tool consisting of two members pivoted together, said membershaving recessed jaws normally facing outwardly from each other andadapted to be further separated when said members are moved inwardlyabout their pivotal connection, and each recess having a walleddepression extending therefrom.

7. A tool consisting of two members pivoted together, said members beingadapted to cross each other on either face and provided with workingjaws normally facing outwardly from each other and adapted to be furtherseparated when said membersare moved inwardly, the opposite faces ofsaid members having stop members extending therefrom at differentdistances from said jaws.

Signed by me at 4: Post Office Sq., Boston, Mass, this 10th day ofApril, 1914.

ROBERT R. PATCHELL.

Witnesses:

VVALTER E. LOMBARD, NATHAN C. LOMBARD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

